A. Ichrar Asbar (2024) Pengaruh Aluminium Sulfat dan Kalsium Monoksida terhadap Efek Akut Cairan Lindi TPA (Tempat Pembuangan Akhir) Sampah. Disertasi thesis, UNIVERSITAS AIRLANGGA.

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Abstract

Objective of this research is to know the effect of three types of reagents, that are alum, CaO, and CaO/alum (1:1) in certain concentration and retention time on the acute effect (EA) of CLTPA at H.rosenbergii (De Man) and to know wich one is the most effective concentration and retention time. The research was a pure experimental u3ing factorial design 6x5 wich involved two factors namely concentration and retention time. The concentration consisted of six levels for alum and CaO: 0 ppm, 100 ppm, 200 ppm, 400 ppm, 8UO ppm, 1600 ppm; and mixture of CaO/alum (1:1): 0 ppm/O ppm, 100 ppm/:OO ppm, 200 ppm/200 ppm, 400 ppm/400 ppm, 800 ppm/800 ppm and 1600 ppm/1600 ppm. The retention time comparised of five levels : 0 minute, 15 minutes, 30 minutes, 60 minutes, and 1~0 minutes. The variable measured was the level of EA calculated from number of acute prawn divided with the total number prawn at the beginning multiplied with 100%. The observation was perfomed 15 minutes after exposure time. Data were analysed using SPSS program for Windows Release 6.0 with anova one way, LSD test and descriptive analysis in from of tables and percentages. The result showed that alum, CaO and mixture of CaO/alum (1:1) as the reagents in certain consentration and retention time had significant effect in reducing EA of CLTPA at the H.rosenberg•ii (De Man) at level of significance 5%. For alum use, alum in ratios of 400 ppm/120 minutes, 800 ppm/60 minutes, 800 ppm/120 minutes were proved to be the most effective treatment, making them capable of reducing EA up to 100%, both due to effects of concentration and retention time. For CaO use, retention time of 120 minutes versus 800 ppm constituted the most effective treatrment, capable of reducing EA by 84.21% resulting from effect of concentration and 75% because of retention time effect. Mixture of CaO/alum (1:1) in concentration of 1600 ppm/1600 ppm and retention time of 120 minutes were proved to be the most effective treatment in reduction of EA up to 76,12% by the effect of concentration and 73,33% by effect of retention time. From those similar treatments, it was found that either CaO or mixtures of CaO/alum were considered to be more effective way to reduce EA through its concentration effect rather than its retention time. The reduction was supposedly caused by the three reagents since a part of toxic deposit with sediment as the result of coagulation, flocculation and precipitation got accelerated by addition of reagent.

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